Material thrower for coating machines



June 22, 1954 s, EARNSHAW 2,681,725

MATERIAL THROWER FOR COATING MACHINES Filed June 20, 1949 7 2Sheets-Sheet l "2' i I Z [A 27 2526 4/ INVEN'I'OR SPENCERHEHRNSRRW June22, 1954 EARNSHAW I 2,681,725

MATERIAL THROWER FOR COATING MACHINES Filed June 20, 1949 2 SheetsSheet2 I NVENTOR SPENCER A. Emausuaw Patented June 22, 1954 OFFICE MATERIALTHROWER; FOR COATING MACHINES Spencer A. Earnshaw, Los Angeles, Calif.Application June 20, 1949, SerialNo; 100,147

4 Claims.

This invention relates to a coating machine wherein a belt drive is usedand especially adapted for-applying a coating'material such as cementlike-material to walls and other surfaces, for example the coating ofpipes and coating of ditches and tunnels and other shaped articlesandfor filling forms; and an object of this invention is to improve themethod of applying materials in the construction of structures, such aswalls, retaining walls and lining or coating and many other surfaces.

Another object of the invention is to able to direct a stream ofmaterial in many directions in relation to the horizontal-and to liftthe entire body of the machine or to lower it while pointing at adesired angle.

Another object is to have free movement in supporting a materialremoving device so as to remove material from a surface while the workis in progress.

A further object of the invention is to move thebelt surface so that itmay come in contact with the work which it has applied, for thepurposeof rubbing against said surfaces.

Another object of the invention is to regulate applied on the materialthe amount of pressure which is on the belt.

Another object is to throw material particles at high speeds.

An advantage of the invention is to change the direction or the travelof the belt so that it may travel forward or reverse;

A further object of the invention is that the machine can be used forthrowing clayparticles in the manufacture of clay products suchas pipe,brick and tile and other articles.

The invention may have a variety of applications and certain of thefeatures of construction may be embodied in a variety of structures.

Other objects, advantages and features of invention may appear from theaccompanying drawings, the subjoined detailed description and theappended claims.

The accompanying drawings illustrate the invention.

Figure 1 is a plan view of the invention.

Fig. 2 is an enlarged fragmental rear end view of Fig. 1.

Fig. 3 is a fragmental detail view of the pressure rollers.

Fig. 4 is a side view of a roller with a valve for inflation purposes.

Fig. 5 is-a side view showing a pressure roller over end of belt pulleysaid pressure roller.

and means of mounting.

Fig. 6 is a front. view showing the impeller mounted on a shaftsupported by extension arms.

Fig. 7 shows means of mounting a multiple number of impeller blades.

Fig. 8 shows a side view of the impeller in position above the belt toremove material from the belt..

Fig. 9 is a detail'side elevational View of one of the extension arms.

Fig. 10 is a fragmental side elevation view looking at the-left side ofthe machine that shows the belt with adjustment take up with theimpelleri mounted in front of the belt and also shows the pressurerollers and spring adjustment, hop- I per. and motor driving means.

It is understood that the coating machine may be made in differentshapes and sizes and various partsof the invention may be constructedwithout departing from the spirit of the invention; but the form shownis at present deemed most desirable for easy and cheap construction andready interchange of parts.

This invention comprises a frame unit 2 so constructed and arranged toberaised and lcvr ed in the uprights 2 that may be of channelcons-truetion being supported rollers and brackets 4, adjustable tiemembers 5 that are used to brace the uprights and to adjust the width ofthe machine whendifierent widths of the frame unit I are used and toraise one of the belt 6 higher than the other edge of the belt.

A cable 1 fastened to slide members 8 andplaced overpulleys 5: windaround drums it which are driven by motors i are fastened to uprights- 2by brackets l2.

Revolvably mounted to slide plate 8 is frame unit I having a worm gearwheel is which is mounted on shaft Nib and being fixed at its to onesideofthe frame unit I which is driven by worm N that is driven by theflexible shaft 55 by motor I6.

Frame unit I is held together by plates l9 and ZiI-and-the plate Zilisadjustable and holds motor 21 which drives chain 22 that drives impellershaft. 23 upon which. is mounted a multiple number of blades 24. I use apair of extension arms 25 which are adjustably mounted and may be of anydesired length and are supported by bolts 26: and the impeller blades 25have several functions one of which is to remove material from Aroundpulley 2i belt 3 extends and backward over drum 33 which is mounted onshaft 34 that is mounted in bearings 35 and bearing box 36 on each end,and shaft 34 is provided with a sprocket 31 at one end. Chain 38 extendsover sprocket 31 which is driven by a motor 39 that is reversible indrive and which is adjustable to various speeds which will be of greatvalue in the use of the machine such as, when material is being removedfrom a surface, the belt may act as a receiver for such material and bedriven backwards to make room for more material; then by reversing thebelt, the said material can be thrown by the impeller to fill up holesor hollows that may appear in the coating.

Side plates 4&3 are provided with recesses 4| and mounted therein areguide bearing boxes 42 provided with bearings .3 that are mounted toshaft 44 and at each end.

A resilient roller 45 composed of tire like units is mounted on shaft 44and forms contact with the surface of the belt 6 and revolves when thebelt is driven.

At the top of recesses 4| are plates 46 which are bolted to plates Gilby bolts 4'! and therein is provided a screw 48 which providesadjustment through the plates and springs l9, whose purpose is to holdbearing boxes 42 in position, so that the resilient roller 45 will havespring action and provide tension against belt 6.

A guard plate 56 forms the front of the hopper and plate 52 forms thebottom.

I provide a multiple number of feed screws or worms which move thematerial along plate 52 and force material onto belt 8 and force thematerial between belt 6 and roller 45 as the belt is driven clockwise,as viewed in Figure 10. BY using a multiple number of these feed screws53 a very wide stream of material can be fed to belt 6, which is animprovement in the feeding of these types of machines where a widestream of material is desired. Feed screws 53 have eX- tension shafts 55that may be constructed of tube like material upon which are mountedthrust bearings or holders 54.

Gear wheels 56 are also mounted on extension shafts 55, and gears 58mesh with gears 5'! so that the screws 53 will revolve in the samedirection at the same time. A sprocket wheel 58 is mounted on one of theshafts 55 and is driven by chain 59 by motor 6i) which is reversible indrive.

In order to hold the surface of belt 6 against the roller 45 I place apressure roller Bl below the upper surface of belt 5 that is used to putpressure against the belt 6 that may be mounted by extension armssimilar to arms 25.

I provide an adjustable means in the form of an adjustable housing 62wherein is mounted bearing 35 for adjustment of the drum 33 and belt 6for alignment of the belt as shown in Fig. of the drawings.

In Fig. 5 is shown a pressure roller 45a mounted over pulley 21 at thefront end of belt 6 used for the purpose of giving the material theearliest possible pressure when the belt is driven counterclockwise andto give the material a final pressure when the belt is driven clockwiseto determine the tangent that the material will leave the belt.

In Fig. '7 is shown a multiple number of detachable impeller bladesmounted on a drum and they may be made of any suitable material such asrubber or any other kind desirable to accomplish the best results sothat any one of the blades may be replaced when damaged.

The operation, uses and advantages of the invention just described areas follows:

By way of example, if a wall is to be plastered, suitable plasteringmaterial is placed within the hopper 51. The frame I is adjusted as toposition, preferably so that said frame extends horizontally as shown inFigures 2 and 10, and adjacent the floor. The motor 39 drives the belt6, while the motors H raise or lower the frame, the frame carryingslides 8, which are guided as to movement on the uprights .2. When themotors 33 and 6c are energized, the belt 6 moves, and the plasteringmaterial is fed by the feed screws 53 between the top surface of theupper.

reach of the belt 6 and the roller 45. The plastering material will bedirected from the belt onto the wall to be plastered. During such anoperation, the motors l I are energized to lift the frame iprogressively from a lower level to higher levels and the entire framemay be revolved as to position so that the material ejected from thebelt surface may strike the wall being plastered at an angle. This isaccomplished through the gear and worms shown at E3 and M, which worm isdriven by the flexible shaft it connected to motor shaft H5. Theadvantage of being able to raise or lower the entire frame relative to astructure to be coated, as well as a tipping of the frame to differentangularities relative to horizontal during such 9. raising or loweringwill be immediately apparent to those skilled in the art. The blades 24mounted upon the impeller shaft 23 are adjustable as to positionrelative to the belt 6, and specifically the roller 21, over which thebelt G is passed, whereby said shaft, by adjusting the position of thearms 25, may be above the belt, as shown in Figure 8, forwardly thereof,as shown in Figure 10, or may assume other positions. As shown in Figure10, the shaft 23 is driven by a motor 2 I, and the blades 24 act uponthe material carried on the belt 6 to increase or decrease the drivingspeed with which said material will strike the surface to be coated, andto direct the path of movement of the material.

The roller 45 is made up of tire-like units, each of which has anindividual yielding action, and which units engage the surface of thebelt 6 as illustrated in Figure 3, so that material delivered from thehopper in by the feed worms 53 will receive the momentum of the belt andthe pressure roller.

I claim:

1. In a machine of the class described comprising an upright frame unitmounted on wheels to be moved in various directions; a pair of slidemembers slidably mounted on said upright frame unit; power means toraise and lower said slide members; a horizontal shaft mounted insaidslide members; a frame unit mounted on said horizontal shaft and havingfixed thereto a worm gear wheel that meshes with a worm attached to aslide member, motor and flexible means to drive said worm and worm wheelthat revolve said frame unit around said horizontal shaft; a pulley atthe front end adjustably mounted in said last mentioned frame unit; apulley adjustably mounted near the rear in the last mentioned frameunit; an endless belt extending around said pulleys, motor means todrive said belt; a

roller composed of tire like units mounted on a shaft; each unit havinga desired diameter and each unit having individual yielding action; ahopper having a multiple number of worms, and

power means to drive said worms to force material from the hopper at avelocity onto the belt so that the material will receive the momentum ofthe belt and the pressure roller and be thrown against a surface to becoated.

2. A machine of the class described provided with an upright framemounted on wheels, a pair of slide members mounted in said uprightframe, a shaft mounted in each slide member, a frame unit mounted onsaid shaft, a motor, a worm and worm gearwheel to revolve said framearound said shaft, a hopper on said frame, a multiple number of worms insaid hopper, means to drive said worms, said hopper bottom formed withan aperture, a roller beneath said hopper adjustably mounted in saidframe unit, a second roller remote from said first mentioned roller, anendless belt extendin around said rollers, means to drive said belt, aroller mounted forwardly of said hopper, which revolves when said beltis driven, said roller being adjustable to hold the belt to the desiredcurvature to maintain pressure against the belt surfaceand materialparticles on the belt, an arm adjustably mounted on the side of saidframe at the front end, a second arm adjustably mounted on the oppositeside of said frame and adjustable to various alignments with said firstmentioned arm, a shaft mounted in self-alignin bearings at each end ofsaid shaft, said bearings being mounted in said arms, a multiple numberof removable resilient blades mounted on said shaft, a motor and meansto drive said shaft to impel material particles that come in contactwith said resilient blades and means to cause said blades to come incontact with said material particles.

3. The device as set forth in claim 2, characterized in that the saidroller mounted forwardly of said hopper comprises a multiple number oftire-like units of rubber-like material.

4. In a machine of the class disclosed, an upright frame unit mounted onwheels to be moved in various directions; a pair of slide membersslidably mounted on said upright frame unit; power means to raise andlower said slide mem-- bers; a horizontal shaft mounted in said slidemembers; a frame unit mounted on said horizontal shaft and having fixedthereto a worm gear wheel that meshes with a worm attached to a slidemember, motor and flexible means to drive said worm and worm wheel thatrevolve said frame unit around said horizontal shaft; a pulley at thefront end adjustably mounted in said last mentioned frame unit; a pulleyadjustably mounted near the rear in the last mentioned frame unit; anendless belt extending around said pulleys, motor means to drive saidbelt; a roller composed of tire-like units mounted on said shaft; eachunit having a desired diameter and each unit having individual yieldingaction; a hopper having a multiple number of worms, power means to drivesaid worms to force material from the hopper at a velocity onto thebelt; and a transverse roller adjustably positioned adjacent the frontend of the frame unit and in contact with the belt to regulate thedischarge tangent of the material leaving the belt.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 236,489 Garrett Jan. 11, 1881 1,040,253 Ray Oct. 1, 19121,065,365 Higgins June 24, 1913 1,523,275 Ney Jan. 13, 1925 1,895,608Conley Jan. 31, 1933 2,069,589 Meijling et a1. Feb, 2, 1937 2,168,329Earnshaw Aug. 8, 1939 2,178,360 Kohout Oct. 31, 1939 2,333,426 JollyNov. 2, 1943 2,391,597 Schwendner Dec. 25, 1945

